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Validity of DSM-IV subtypes of conduct disorder based on age of onset.
Lahey BB, Loeber R, Quay HC, Applegate B, Shaffer D, Waldman I, Hart EL, McBurnett K, Frick PJ, Jensen PS, Dulcan MK, Canino G, Bird HR. Lahey BB, et al. J Am Acad Child Adolesc Psychiatry. 1998 Apr;37(4):435-42. doi: 10.1097/00004583-199804000-00022. J Am Acad Child Adolesc Psychiatry. 1998. PMID: 9549965 Free article.
Validity of the age-of-onset criterion for ADHD: a report from the DSM-IV field trials.
Applegate B, Lahey BB, Hart EL, Biederman J, Hynd GW, Barkley RA, Ollendick T, Frick PJ, Greenhill L, McBurnett K, Newcorn JH, Kerdyk L, Garfinkel B, Waldman I, Shaffer D. Applegate B, et al. J Am Acad Child Adolesc Psychiatry. 1997 Sep;36(9):1211-21. J Am Acad Child Adolesc Psychiatry. 1997. PMID: 9291722 Clinical Trial.